3.0 moles of Hydrogen gas react with 31.0g of solid phosphorous to form phosphine gas. Complete the problem by choosing the correct pull downs quantities in the bca table below.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

How are isotopes of the same chemical element alike? how are they different?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled